Analysis of MTDC Inertia Emulation Impact on Connected AC Systems

Wang, Shuyao; Zhang, Shuoting; Ma, Yiwei; Wang, Fred; Tolbert, Leon M.

doi:10.1109/ecce.2018.8557977

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…Another method for grid frequency support is inertia emulation using the DC voltage link in the VSD. This is a method commonly used for wind turbines or multi-terminal HVDC (MTDC) systems [14]. In this method when used for MTDC, both the electric energy stored in the DC link capacitors and the energy transferred from the remote grid side to the main AC transmission grid are used to regulate the grid frequency.…”

Section: Grid Frequency Support Using Variable Motor Speedmentioning

confidence: 99%

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Primary Frequency Control Using Motor Drives for Short Term Grid Disturbances

Short

Wang

Tolbert

et al. 2021

IEEE Open J. Ind. Applicat.

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Industrial motor systems make up a quarter of all electric sales in the United States. Variable speed drives (VSDs) can provide energy efficiency savings to the customer by regulating motor speed based on specific and varying needs. In addition to the benefits provided to the customer, VSDs can provide support to the grid through ancillary services. The Center for Ultra-Wide-Area Resilient Electric Energy Transmission Networks (CURENT) developed a power electronics converter-based grid emulator to allow testing of various power system architectures and demonstration of key technologies in monitoring, control, actuation, and visualization. This paper proposes using an active front-end VSD's connected motor load to provide frequency regulation to a large scale power grid. Each part of the emulator is described including motor and power electronics model and control. The proposed frequency regulation is implemented in VSDs and modeled in both a transmission system in EMTDC/PSCAD and verified on CURENT's hardware testbed.

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Section: Grid Frequency Support Using Variable Motor Speedmentioning

confidence: 99%

“…where N is the number of the DC link capacitors, C is the capacitance of each dc link capacitor, S V SC is the rated power of the VSC. For a 2.5 kW motor, the K C would be optimized to 77.16 and the LPF would be set at 30 Hz [14].…”

Section: Grid Frequency Support Using Variable Motor Speedmentioning

confidence: 99%

Primary Frequency Control Using Motor Drives for Short Term Grid Disturbances

Short

Wang

Tolbert

et al. 2021

IEEE Open J. Ind. Applicat.

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Stability improvement of interconnected AC / DC multiarea AGC power systems using optimized virtual synchronous power strategy based on eigenvalues sensitivity and adaptive mixed GWO

Tebib

Boudour

2021

Int Trans Electr Energ Syst

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Summary In this paper, a tuning approach for HVDC control technology based on virtual synchronous power (VSP) concept is developed and reflected in an extended multiarea automatic generation control (AGC) system including renewable energy sources (RES). A novel, nature‐inspired algorithm named adaptive mixed grey wolf (amixed GWO), which combines two improved versions of GWO, was recently proposed in order to effectively handle a problem with both discrete and continuous variables. This algorithm was first applied to optimize the VSP‐based controller parameters based on integral square error (ISE). The performance of the proposed algorithm has been compared with FMINCON's interior‐point algorithm to demonstrate its positive effects on the system stability. For better dynamic performances, a new optimization approach based on eigenvalues sensitivity analysis was proposed for the purpose of achieving optimal VSP control variables tuning for different power system structures. Simulation tests were performed to show the higher level of stability performance achieved by the proposed approach compared to the one based on ISE. Simulation results also revealed that the amixed GWO technique has better tuning capability in comparison with the other applied GWO versions.

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